Question: The following is a portion of an mRNA sequence: 3′ – AUCGUCAUGCAGA – 5′ a. During transcription… The following is a portion of an mRNA sequence: 3′ – AUCGUCAUGCAGA – 5′ a. During transcription was the adenine at the left-hand side of the sequence the first or the last nucleotide added to the portion of the mRNA shown? b. Write out the...